Originally Posted by fuelie327

normal low side with 134a is 40 to 45. High side pressure should be aroun 200 to 250 . if the high side is getting too high put a fan in front of the condenser or run a water hose on the condenser and see if the high side comes down. If it does and the low side stays at 40 or so than you need to put an auxillary fan on the condenser . you said 90 on the low side ? And 125 low side ? Thats a high side restriction . Its backing up into the low sie. Eitherw way you shoul pull the otube and check it for metal .If its real bad you may as well change the condenser . If its real bad you'll never flush the condenser good enough